From yesterday’s ceremony - Nahal Haredi Elite battalion of the IDF sings Ani Ma’amin
The penultimate line refers to the essential Jewish belief in the coming of the Mashiach. As such, this line has become a popular source of lyrics for Jewish songs.
One version of the tune is attributed to the Reb Azriel David, a Modzitser Hasid, who reportedly composed the tune in a cattle car when being taken to Treblinka. The tune was taken up by the other Modziter Hasidim who sang the song as they were being herded into the gas chambers of the Nazi concentration camps.
The song was then adopted by other Jewish prisoners and became known as the Hymn of the Camps. It is still frequently sung at Holocaust Remembrance Day services. Some also sing it at the Pesach Seder, in memory of the Warsaw Ghetto Uprising, which began on the first night of Pesach in 1943.